The investigators performed a 12-week, randomized, double-blind, placebo-controlled human trial to evaluate the efficacy and safety of Cauliflower Mushroom extract on promotion of immunity. The investigators measured promotion of immunity parameters , including Cytotoxicity, Cytokine (IL-4, IL-10, IFN- γ, TNF-α), and CBC (WBC, RBC, Hb, Hct, MCV, MCH, MCHC, PLT), and monitored their blood pressure.